HYDROO VDROO Serie Manual De Instrucciones De Instalación Y Operación página 47

Fault Cause
a) Supply failure.
b) Fuses are blown.
c) Motor overloaded.
1. Motor does not
run when started.
d) Main contacts in motor-protective
circuit breaker are not making contact
or the coil is faulty.
e) Control circuit is defective.
f) Motor is defective.
a) Fuses are blown.
b) Contacts in motor-protective circuit
breaker are faulty.
2. Motor-protective
circuit breaker trips
c) Cable connection is loose or faulty.
immediately when
power supply is
switched on.
d) Motor winding is defective.
e) Pump mechanically blocked.
a) Motor-protective circuit breaker
setting is too low.
3. Motor-protective
circuit breaker trips b) Defects regular power supply.
out occasionally.
c) Low voltage at peak times.
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Remedy Observations
a) Check the power
supply.
b) Replace fuses.
c) Check the system.
d) Replace contacts
or magnetic oil.
e) Repair the control
circuit.
f) Replace the motor.
a) Replacefuses.
b) Check the motor-
protective circuit
breaker.
In case d) and e),
c) Fasten or replace
the user should
the cable connection.
not dismantle the
pump himself
d) Replace the motor.
e) Remove the
mechanical blocking
of the pump.
a) Set the motor-
protective circuit
breaker correctly.
b) Check power
supply.
c) Add regulator.
Fault Cause
a) Motor-protective circuit breaker does
not do contact or motor winding is
4. Motor-protective
defective.
circuit breaker has
not tripped but the
pump does not run.
b) Defective control circuit.
a) Suction pipe too small.
b) Not enough water at the suction inlet
5. The pumped
fluid does not flow
c) Lower fluid level.
regularly.
d) Low pump suction compared to the
water temperature. Leak in the pipe
and flow.
e) Suction pipe partially blocked by
impurities.
a) Suction pipe/pump blocked by
impurities.
b) Foot or non-return valve blocked by
impurities.
6. Pump runs but
discharges no
water.
c) Leakage in suction pipe.
d) Air in suction or pump.
a) Leakage in the suction pipe.
b) Foot or non-return valves are closed.
7. Pump runs in the
opposite direction
when switched off.
c) Foot or non-returnvalves blocked in
open position or partially open.
d) There is air in the suction pipe.
Remedy Observations
a) Replace the motor-
protective circuit
breaker.
b) Check the control
circuit.
a) Lengthen intake
pipe.
b) Improve system
and increase the water
which reaches the
pump.
c) Try to increase fluid
level.
d) Improve the system
and try to increase the
suction pressure.
e) Check and remove
impurities.
a) Check and clean
suction pipe.
b) Check and clean
the foot or non-return
valve.
c) Check and repair
suction pipe.
d) Refill with fluid and
extract air.
a) Check and repair
the suction pipe.
b) Check and repair
food or check valves.
c) Check and repair
the food valve.
d) Check, repair s
uction pipe and bleed
the air.
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